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BXT Series Bar Extensions
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Allows use of sphere-fit routines for hard-to-target points |
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The BXT Series Bar Extensions are used in conjunction
with the Tooling Ball Adapters (TBA)
or Bar Points (BP) on one end,
and various SMR holders having a mating shank (1/4" or 6mm) on the
other. This type of assembly (see photo below) is
often used to locate and specify points using
sphere-fit routines*. Use our BP point with the BXT
bars when targeting scribe lines
or other points of interest on surfaces or contours.
Then replace the BP with our TBA adapter
to target the centers of tooling balls. Or, use
this assembly and the sphere-fit procedure with our
Construction Tooling Ball (TB) targeting
accessory. This technique is especially useful when the
desired targets are obscured from view. It allows you to
avoid making additional tracker moves and subsequent rebundles,
thereby saving time and potential error buildup. These
adapters make more efficient use of your laser tracker
equipment while maintaining the accuracy needed for most
tasks.
English or metric bars are available, having, respectively, 1/4"
or 6mm shanks and matching 1/4" or 6mm precision bores on the
opposite end of the bar. All shanks are drilled and tapped
with a 6-32 internal thread. The shank then mates with the
connecting screw on the inside of an
TBA or
BP tip, again assuming that English
and metric tips are matched with English and metric bars,
respectively. Both tips are seen in the photo at left.
The precision bore on the opposite end will accept SMR nests which
have a matching shank diameter (1/4" or 6mm), such as
1.5TH-1-.25 or 1.5TH-25MM-6MM. These accessories are held in place
with a radially-mounted 6-32 nylon-tipped setscrew.
* A "sphere fit rod" assembly (right) may be
constructed from a BXT bar, an SMR adapter, and a BP Bar Point or
a TBA Tooling Ball Adapter. It is used to measure a number of
points which are all a given distance away from one
particular point of interest, making that point of interest
the center of an arbitrary sphere. Then, a sphere-fit
routine is commonly used to calculate that center point.
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Model |
Length "A" |
Dia. "D" |
| BXT-5 |
5.0000" |
0.250" |
| BXT-10 |
10.0000" |
0.250" |
| BXT-125 |
125mm |
6mm |
| BXT-250 |
250mm |
6mm |
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Tolerance, precision bore: +0.0005", −0.0000"
(+0.013, -0.000mm)
Tolerance, shank: +0.0000", −0.0005"
(+0.000mm, −0.013mm) |
Tolerance, length: ±0.0005" (±0.013mm)
Material: Stainless Steel
Hardness: HRC 42-45 |
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